The lawsuit, filed in a federal court, argues that Canadian laws prevent military exports to Israel because there is "substantial risk" they could be used to violate international law and commit serious acts of violence against women and children, according to a statement from the applicants.
Israel launched a ground and air assault on the Gaza strip nearly five months ago in response to a Hamas attack on Oct. 7 that killed 1,200 people. More than 30,000 people have been killed by Israel's assault.
Since then Ottawa has authorized at least C$28.5 million ($21.0 million) worth of new permits for military exports to Israel, more than the value of such permits allowed in the previous year, the applicants said.
The applicants include the Canadian Lawyers for International Human Rights group, the Palestinian organization Al-Haq and four individuals.
Canada's foreign ministry did not have an immediate comment. Israel says it respects international law and that it has a right to defend itself after the Hamas attack.
NATO allies the United States and the Netherlands also face lawsuits over the Gaza war. Last month, a Dutch court ordered the government to block all exports of F-35 fighter jet parts to Israel over concerns they were being used to violate international law.
Israel's military campaign has prompted regular pro-Palestinian protests in major Canadian cities. Last week, demonstrators gathered at gun maker Colt Canada's facility in Kitchener, Ontario.
Prime Minister Justin Trudeau has consistently said Israel has the right to defend itself after the Hamas assault in October. Senior officials though have called for an immediate and sustained ceasefire in the conflict.
($1 = 1.3596 Canadian dollars)
(Reporting by Ismail Shakil in Ottawa, editing by David Ljunggren and Nia Williams)
By Ismail Shakil
